Reusable waterborne polyurethane shielding material and preparation method thereof

A technology for water-based polyurethane and masking materials, applied in the field of polyurethane materials, can solve the problems of non-reusable, difficult to handle, not environmentally friendly, etc., and achieve the effects of easy tearing, saving production materials, and reducing waste
CN112250818APending Publication Date: 2021-01-22长春一汽富维东阳汽车塑料零部件有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
长春一汽富维东阳汽车塑料零部件有限公司
Publication Date
2021-01-22

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Abstract

The invention relates to a reusable waterborne polyurethane shielding material and a preparation method thereof. The preparation method of the material comprises the steps that: 1, any one or a combination of two or more of polypropylene oxide glycol, polypropylene oxide triol, polytetrahydrofuran ether diol and 3001 polyester polyol, and a plasticizer, are weighed and placed in a reactor filled with nitrogen, stirring the materials at the temperature of 75-95 DEG C and reacting for 15-30 minutes; (2) adding toluene diisocynate, an emulsifier and a curing agent into the reactor, adjusting thewater bath temperature to 80-95 DEG C, and stirring for 30-50 minutes; (3) adding polyethylene glycol monomethyl ether, continuously reacting for 1-2h, dropwise adding a cross-linking agent and a chain extender, adding deionized water to adjust the solid content to 40-60%, continuously reacting for 1-2h, and performing cooling; and (4) adding talcum powder into the raw materials obtained in the step S3, and performing uniform stirring to obtain the waterborne polyurethane shielding material. The material is waterborne polyurethane, can realize good bonding and shielding effects, and has the advantages of high viscosity, reusability, simplicity in operation, no pollution in after-treatment and the like.
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Description

technical field

[0001] The invention belongs to the field of polyurethane materials, and in particular relates to a reusable water-based polyurethane masking material and a preparation method thereof. Background technique

[0002] During the processing of existing auto parts, masking treatment is required for parts that do not need to be sprayed. For example: when spraying a bumper, in order to ensure that the pull-out force of the bumper radar area is qualified and to avoid paint mist attached to the radar pasting area, it is necessary to cover the bumper radar hole area.

[0003] At present, the masking method is mainly based on adhesive tape or masking paper (plastic film). However, after the adhesive tape is treated at a high temperature of 80°C on the base material, the adhesive performance of the adhesive decreases, and residual adhesive is easy to remain on the surface of the product, the post-processing is complicated, and the used adhesive tape cannot be reused, an...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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